DEM在三峡库尾河道演变分析中的应用
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摘要
DEM是河道演变分析的重要数据来源。针对三峡库尾研究区域的特点和DEM数据量的大小,通过合理组织、调取DEM并配以各类算法,使之既能在计算时尽可能减少计算机资源的占用与网络等待时间,又能很好地实现人机交互,展现可视化的计算成果。简要介绍了DEM的组织与调用,着重就DEM在河道地形分析中的应用作了详细介绍,包括槽蓄量计算、槽蓄量沿程分布面积图的绘制、冲淤量高程曲线绘制、冲淤厚度分布图的绘制以及开挖分析等。
DEM is an important data source of fluvial analysis. With consideration of the characteristics of the backwater zone and data size of DEM,rational organization and transfer of DEM is conducted by using certain techniques and diversified algorithms,which not only lessen the occupancy time and network wait of computer resources as far as possible,but also realize man-machine interaction well,show the computing results of visualization. The organization and transfer of DEM is briefly introduced,particularly,the application of DEM in channel topography analysis is also described in detail,including calculation of channel storage,plotting of distribution area graph along the channel,elevation curve for deposition and scour,and distribution diagram for thickness of depositing and scouring as well as sediment mining control analysis.
DEM is an important data source of fluvial analysis. With consideration of the characteristics of the backwater zone and data size of DEM,rational organization and transfer of DEM is conducted by using certain techniques and diversified algorithms,which not only lessen the occupancy time and network wait of computer resources as far as possible,but also realize man-machine interaction well,show the computing results of visualization. The organization and transfer of DEM is briefly introduced,particularly,the application of DEM in channel topography analysis is also described in detail,including calculation of channel storage,plotting of distribution area graph along the channel,elevation curve for deposition and scour,and distribution diagram for thickness of depositing and scouring as well as sediment mining control analysis.
引文
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[4]邹小香,李伟,刘海华.数字高程模型(DEM)的获取方法及其应用[J].江西测绘,2011,(3):61-64.
[5]潘绍强.浅析数字高程模型(DEM)在土方量计算中的应用[J].浙江水利科技,2007,149(1):63-65.
[2]牛瑞卿.可视化技术在水文泥沙分析中的应用[J].人民长江,2005,36(8):36-37.
[3]李志林,朱庆.数字高程模型[M].武汉:武汉大学出版社,2001.
[4]邹小香,李伟,刘海华.数字高程模型(DEM)的获取方法及其应用[J].江西测绘,2011,(3):61-64.
[5]潘绍强.浅析数字高程模型(DEM)在土方量计算中的应用[J].浙江水利科技,2007,149(1):63-65.